"const float3x3 yiq2rgb_mat = float3x3(\n"
"   1.0, 0.956, 0.6210,\n"
"   1.0, -0.2720, -0.6474,\n"
"   1.0, -1.1060, 1.7046);\n"
"\n"
"float3 yiq2rgb(float3 yiq)\n"
"{\n"
"   return mul(yiq2rgb_mat, yiq);\n"
"}\n"
"\n"
"const float3x3 yiq_mat = float3x3(\n"
"      0.2989, 0.5870, 0.1140,\n"
"      0.5959, -0.2744, -0.3216,\n"
"      0.2115, -0.5229, 0.3114\n"
");\n"
"\n"
"float3 rgb2yiq(float3 col)\n"
"{\n"
"   return mul(yiq_mat, col);\n"
"}\n"
"\n"
"\n"
